| Popis: |
An improved method was used for reinterpretation of data obtained by Markevich et al. on the thermal cracking of methane in an apparatus for adiabatic compression and expansion (within the range of 1590° to 1750°K at a pressure of ca 20 atm). A rate constant k =1×10 15 exp (−103,000/ RT ) was obtained for the primary reaction step. The latter was suggested to be CH 4 →CH 3 +H. It follows from theoretical evaluation of the rate constant for unimolecular methane decomposition by a second-order reaction that, under the experimental conditions used, this process will be first order. |
